Improvement in tinmen s-tongs



use SAMUEL T. DlcKlNse'N.

Improvement i'n Tinmans Tongs.

Patented Dec.12,1871.

7MB/awe@ UNITED STATES PATENT QEEICE.

SAMUEL T. DIGKINSON, JR., OF BELVIDERE, NEW JERSEY, ASSIGNOR TO HIM- SELF AND EZRA DE WITT, OF SAME PLACE.

IMPROVEMENT IN TINMENS-TONGS.

Specification forming part of Letters Patent No. 121,763, dated December 12, 1871.

To all whom it may concern:

Be it known that I, SAMUEL T. DrcKnvsoN, J R., of Belvidere, in the county of Warren and State of New Jersey, have invented certain Improvements in Tinmens Tongs, of which the following is a specification:

My invention consists in the improvement of tinlnens ton gs, as hereinafter fully described and subsequently pointed out in the claims.

In the accompanying drawing, Figure l is a top view of the tongs, the jaws having a central slot for the gauge-pointer, and marks of inches and fractions oi' inches for setting the gauge. Fig. 2 is a cross-section of Fig. l, taken on the line a; ac.

Similar letters of reference indicate corresponding parts.

This tongs is formed of two jaws, A and B, hin ged together like a butt-hinge, with pintle G, each jaw having ahandle, D and E, rigidly attached to the jaws, the jaws and the handles being connected to operate like the ordinary tongs. These jaws are chambered out on their inner sides, forinin g a hollow space, F. G is the gauge-bar, which extends through the space F, as seen in Fig. 1 in dotted line. H is a slot in the top jaw A. I is a lug on the guage-bar, which projects through the slot H. J is an index-pointer by which the gauge is set to correspond with the lines marked 1,1%, 2, Src., indicating inches on the jaw A. The side edges of the jaw A are grooved, as indicated by dotted lines. The ends of the gauge-bar G are turned up onto these edges with set-screws K therein. The ends ofthe set-screws slide in the groove when the gauge is moved, and when the gauge is placed in the desired position the screws are turned up and conne it there. L L are guidearms attached to the guide-bar G, standing at right angles therewith. These arms pass through the slots M M in the back jaw B and project therefrom, as seen in Fig. 2, when the jaws are closed. When the tongs are open and applied to the edge of the metal sheet the edge of the metal will be likely to strike these arms and thereby be prevented from passing beyond the gauge. When the jaws are closed the edge ofthe sheet is forced by the jaws B down to the gauge, when the.angle in the sheet may be made at the edge of the tongs, as indicated in Fig. 2. These tongs may be made of any size, so that with a single pair an edge may be turned on. sheet metal from halt1 an inch to twelve inches, and the work may be done by one man, whereas in turning edges in putting on tin-rooin g in the ordinary way, or by the tnners7 tongs now in use, three or four men are required. The advantage of having an adjustable gauge arranged and operating as described niust be apparent to all who are at all acquainted with tinmens tongs.

Having thus described my invention, I claini as new and desire to secure by Letters Iatent- 1. The jaws A B, chainfered to forni a hollow space, F, and slotted at H, combined as described with a gauge, G, having lug I and guide-arms L L adjustable in said inner space F, as described, and for the purpose speciiied.

2. The combination, with said slotted-jaws A B-of which oneis groove'd on the side-edges-and said gauges G L L L, of the set-screws K K, applied as and for the purpose set forth.

3. The lug I and index-pin J, arranged substantially as and for the purposes described.

SAML. T. DIGKINSON, JR.

Witnesses:

F. SEARLEs,

E. G. WANNEE. (136) 

